package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired DishMapper dishMapper;
    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDishs(SetmealDTO setmealDTO){
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //向套餐中插入套餐数据
        setmealMapper.insert(setmeal);
        //获得insert语句返回的主键值
        Long setmealId = setmeal.getId();

        List<SetmealDish> dishes = setmealDTO.getSetmealDishes();
        if(dishes != null && dishes.size() >0){
            dishes.forEach(setmealDish ->{
                setmealDish.setSetmealId(setmealId);
            });
        }

        //向套餐-菜品表中插入n个菜品数据
        setmealDishMapper.insertBatch(dishes);

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO){
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 套餐批量删除
     * @param ids
     */
    public void deleteBatch(List<Long> ids){
        //判断套餐是否能够删除----是否存在起售中的套餐
        for(Long id: ids){
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //删除套餐
        setmealMapper.deleteByIds(ids);

        //删除套餐-菜品关联表里的相关数据
        setmealDishMapper.deleteBysetmealIds(ids);
    }

    /**
     * 根据id查询套餐以及关联菜品
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id){
        //根据id查套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        //根据id查套餐都菜品数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBysetmealId(id);
        //将数据封装到vo
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return  setmealVO;
    }

    /**
     * 更新套餐
     * @param setmealVO
     */
    public void updateWithDish(SetmealVO setmealVO){
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealVO,setmeal);
        //修改套餐基本信息
        setmealMapper.update(setmeal);
        //删除原有套餐-菜品关联

        //重新插入新的套餐-菜品关联
    }

    /**
     * 起售停售套餐
     * @param status
     * @param id
     */
    public void startorstop(Integer status, Long id){
        //起售时先判断套餐内是否有停售产品，有停售产品就无法起售
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(dish.getStatus() == StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        //更改套餐状态
        Setmeal setmeal = Setmeal.builder()
                .status(status)
                .id(id)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
